Task 4 (18 points). Open the brackets using the positive or negative form of the imperative mood.
1) ___ the window, please. It's cold. (open)
2) ___ go outside. It's raining now. (let)
3) I'm thirsty. ___ a glass of water then. (drink)
4) ___ watch a firework display tonight! It will be amazing! (Let)
5) The exam is in progress. ___ quiet, please. (be)
6) ___ afraid of my dog. It's very friendly. (be)​